Flex M

CK, yes you're right - the early 800/8 is just a doublet all the way in the front of an otherwise empty tube! I also have this lens, and it's the longest by far! ;) I haven't been able to use it ...

Interesting oldie lens. The center hot spot is disconcerting on digital however! I had a similar experience with the old Vivitar/Tokina? 800/8 that had an element very close to the focal plane. ...

I got a K mount -> NEX reducer for $3.77 delivered a while back. The pics looked exactly like the Roxsen, and that's what it is. Optically it's only good in the center, softer on edges. But I ...

I wonder if there is a way to fine tune adjust the centering of the image circle from the Meike. It just needs a tiny nudge on APSC to be a 100% circle!?

Good point, almost forgot about that! There's no magic, and the Meike produces a circle that is ever slightly cut off on top of frame on APS-C. However it's a 190 degree lens, and the horizon is ...

Yes, that was my original plan to have a circular FE of 220 degrees on the tiny Q! However I've also gone another route recently with the Meike 6.5mm 2.0 circular FE for Sony on an NEX-3N (same ...

I'm the one who posted those diagrams to PF. I've already updated with the files .. thanks! As far as stabilization, idk that it can even work with a circular fisheye? The IR block cover over the ...

I will experiment and let you know. I do think it's bonded somehow. The inner guts (sensor) only cost me $7 delivered, so no loss if it doesn't work out!

Hello Kjeld, sorry for the long delay .. I haven't delved into it just yet. But - I do have some info you may find useful on disassembly of the original Pentax Q: https://kayakfari.wordpress.com/ph ...

I have a similar 220 degree circular fisheye in 12mm board mount that I'd like to work with the Q. Like you, I quickly discovered that it has an ultra short flange focal distance. This means that ...

Yes that would be interesting to know. The phosphors are maybe half a millimeter? Here are the facts: Pentax Auto Bellows M fully extended + 36mm tube Spiratone 35mm 3.5 enlarger lens (at f/8) Pent ...

Ever wonder what the actual pixels on your TV look like? I achieved my goal of a clean super closeup shot of just the three primary color phosphors. Taken with a Spiratone Macrotar 35/3.5 lens on a ...

Ever wonder what the actual pixels on your TV look like? I achieved my goal of a clean super closeup shot of just the three primary color phosphors. Taken with a Spiratone Macrotar 35/3.5 lens on a ...